LATROBE, Pa., May 18, 2011 — (PRNewswire) — Kennametal Inc. (NYSE:
KMT) announced today that it has received Delphi's 2010 Pinnacle Award for Supplier Excellence. The award, established in 2004, recognizes Delphi's top suppliers for their contribution to Delphi's Excellence culture. The Award also provides annual recognition to a premier group of Delphi suppliers for their commitment to and achievement of Quality, Value, and Cost performance.

"This award recognizes Kennametal's dedication to excellence," said Sid Johnson, vice president, Delphi Global Supply Management. "Congratulations to your team, many of whom are working diligently at your facilities. Please extend our appreciation to them for their efforts."

"Delivering the promise to our customers in order to make them more productive every day is a top priority," commented Dr. Kemal Yegenoglu, Kennametal Vice President Global Transportation Business. "We are extremely proud to be recognized by Delphi for excellence for the past three years and consider this award a reflection of our commitment to customer loyalty and satisfaction."

This year Delphi recognized 16 suppliers from seven countries with its 2010 Pinnacle Award for Supplier Excellence.

About Delphi

Delphi is a leading global supplier of electronics and technologies for automotive, commercial vehicle and other market segments. Operating major technical centers, manufacturing sites and customer support facilities in 30 countries, Delphi delivers real-world innovations that make products smarter and safer as well as more powerful and efficient. Connect to innovation at
www.delphi.com.

About Kennametal

Kennametal Inc. (NYSE:
KMT) delivers productivity to customers seeking peak performance in demanding environments by providing innovative custom and standard wear-resistant solutions. This proven productivity is enabled through our advanced materials sciences and application knowledge. Our commitment to a sustainable environment provides additional value to our customers. Companies operating in everything from airframes to coal mining, from engines to oil wells and from turbochargers to construction recognize Kennametal for extraordinary contributions to their value chains. In fiscal year 2010, customers bought approximately $1.9 billion of Kennametal products and services – delivered by our approximately 11,000 talented employees doing business in more than 60 countries – with more than 50 percent of these revenues coming from outside North America. Visit us at
www.kennametal.com.